∨

In its original sense "disjunction", probably from the initial letter of Latin vel (“or”).

∨

1. (mathematics, logic) disjunction
2. (algebra, order theory) join, supremum
3. (topology) wedge sum

• In symbolic logic, this symbol is called "vel".

• (disjunction): OR
• (join): (rare in algebra) sup

• ⊽

• ∧
• ⋁